Linen fabrics have thicker fibers and larger Young’s modulus, so they have stronger stiffness. Moreover, due to the weak cohesion between fibers and low spinnability, hairiness is easily generated during processing. Therefore, it feels rough and hard after dyeing. To solve the problem of soft and waxy feel, it is not enough to just apply softener after dyeing. You must consider improving the feel of the fabric starting from pre-treatment. Specifically, the following measures can be taken:
1. Clean the singeing. The purpose is to remove hairiness on the surface of the fabric. If the singeing is not clean, there will be short, thick and hard hairy roots, which will affect the feel of the fabric;
2. Cellulase treatment. Cellulase can catalyze the hydrolysis of B-1.4 glucoside glycosides in cellulose and is an effective means to improve the feel of linen fabrics. It can be used for pre-dyeing and post-dyeing treatment, but it can also play a role in desizing before fabric dyeing, which can be said to kill two birds with one stone. Taking overflow dyeing machine treatment as an example, the process is roughly as follows: pretreatment (acetic acid 2g/l, room temperature, treatment for 5 minutes) – enzyme treatment (enzyme dosage 0.5-1.5g/l, liquor ratio 1:30, temperature 50°C -60℃, time is 40-60min, use acetic acid to adjust pH to 4.5-5.0). If post-dyeing treatment can be followed by softening treatment (softening agent 10-20g/l, liquor ratio 1:15, temperature 60°C, time 15min) – drying.
3. Choose a good softener. You can choose amino silicone softeners, polyoxyethylene and other softeners, special reactive softeners, elastomer modified silicone and other softeners. The long car processing process is: padding softener – drying – baking ( 130-150℃, 2-3min).
4. If conditions permit, sand washing and liquid ammonia treatment can also be carried out.
5. Pre-shrinking machine. After being pre-shrunk by a felt blanket pre-shrinking machine, the fabric will become softer and more elastic. You can adopt the above methods according to the conditions of the enterprise. I believe the fabric feel will be greatly improved.
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